Epulis (plural Epulides)


The most frequently diagnosed oral tumour in dogs is the epulis. This is a group of gingival tumours characterised by slow growth, with minimal invasion and no propensity for metastasis.

There are many names that are, have been and indeed will be used to define these tumours. These names, and the fact that they seem to change regularly, create confusion which we will not deepen by trying to elucidate further.

Epulides do cause discomfort. They induce pressure necrosis of bone, tooth loosening and loss and, once they are of a size that can be seen, are a source of constant discomfort. Treatment is recommended.

Epulides arise from the periodontal ligament, within the dental alveolus, or from vestigial remnants of dental enamel-forming organs. In both cases, they arise from a deep element of the jaw apparatus. They are never simply superficial proliferations of otherwise normal gingival tissue.

The gingiva is a reactive tissue which will proliferate in response to an irritant or inflammatory stimulus. Superficial biopsy of proliferative gingiva overlying an epulis may therefore erroneously merely indicate hyperplasia.

Sharp dissection or cautery to excise the bulk of a gingival mass is an excellent technique to obtain a biopsy in these and other gingival mass lesions. However, it will never achieve resolution of something that arises within the dental alveolus.

Complete removal of epulides requires removal of bone. In some cases, the tumour arises from the periodontal ligament on the most abaxial surface of the tooth root.

In this hypothetical situation, the tumour can be removed by burring the dental alveolus, removing the tooth and only a partial thickness of the associated bone. Typically, however, the mass has developed too extensively for this approach to succeed. In these circumstances, segmental maxillectomy or mandibulectomy is required.

Classical appearance of a fibromatous epulis, currently called peripheral odontogenic fibroma
Acanthomatous ameloblastoma (right) and fibromatous epulis (left) in same mandible. Right canine tooth was included in resection but left canine was preserved

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Oncology Team

Our Oncology Team offer a caring, multi-disciplinary approach to all medical and surgical conditions.

Gerry Polton

MA VetMB MSc (Onc) DipECVIM (Oncology) MRCVS

Francesca Fabrizio

DVM MVetMed DipACVIM (Oncology) MRCVS

Michael Macfarlane

BVMS(hons) DipECVIM-CA (Oncology) MRCVS

Katherine Smallwood


Sofia Ramos